Hi Masami Hiramatsu,
On Sun, Feb 25, 2018 at 11:50:37AM +0900, Masami Hiramatsu wrote:
> commit e1a50de37860 ("arm64: cputype: Silence Sparse warnings")
> introduces "UL" suffix to a hex number, but it causes a build error with
> gcc-6 series.
> I've hit below error with 6.2.1 and 6.4.1. Of course this is resolved by the
> latest
> stable gcc-7.2.1. But from the compatibility point of view, should we revert
> it?
>
> AS arch/arm64/kernel/head.o
> /home/mhiramat/ksrc/linux/arch/arm64/kernel/head.S: Assembler messages:
> /home/mhiramat/ksrc/linux/arch/arm64/kernel/head.S:677: Error: found 'L',
> expected: ')'
> /home/mhiramat/ksrc/linux/arch/arm64/kernel/head.S:677: Error: found 'L',
> expected: ')'
> /home/mhiramat/ksrc/linux/arch/arm64/kernel/head.S:677: Error: found 'L',
> expected: ')'
> /home/mhiramat/ksrc/linux/arch/arm64/kernel/head.S:677: Error: junk at end of
> line, first unrecognized character is `L'
> /home/mhiramat/ksrc/linux/arch/arm64/kernel/head.S:677: Error: unexpected
> characters following instruction at operand 2 -- `movz
> x1,:abs_g1_s:0xff00ffffffUL'
> /home/mhiramat/ksrc/linux/arch/arm64/kernel/head.S:677: Error: unexpected
> characters following instruction at operand 2 -- `movk
> x1,:abs_g0_nc:0xff00ffffffUL'
> make[2]: *** [/home/mhiramat/ksrc/linux/scripts/Makefile.build:425:
> arch/arm64/kernel/head.o] error 1
>
> I've checked with below 2 latest gccs.
>
> http://releases.linaro.org/components/toolchain/binaries/latest-6/aarch64-linux-gnu/gcc-linaro-6.4.1-2017.11-x86_64_aarch64-linux-gnu.tar.xz
>
> http://releases.linaro.org/components/toolchain/binaries/latest-7/aarch64-linux-gnu/gcc-linaro-7.2.1-2017.11-x86_64_aarch64-linux-gnu.tar.xz
The fix is pending:
https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/commit/?h=fixes/core&id=04c4927359b1f09310bfee92e7187c9022be3e00
This is in Linus' tree now, so should be in -rc3.
baruch
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